I'm looking for this also. :)

I whipped up a really simple Quick ShoutBox based on a forum. It's a hidden forum, well almost, I just don't show it, it's accessable. New threads are off, html is off, image code is off. BBcodes are on and so are smilies. There is only one thread. All posting permissions are handled by standard vB stuff. Display uses the security model from showpost. We have it set to only display the last shout.

The last post in that thread is the shout.

It's one template edit and one plugin for forumhome complete. It has one fast indexed query.

We're testing it now. If it seems useful, I will post it.

Quick ShoutBox Demo.